Power-shears for cutting knit or woven fabrics



(No Model.)

W. DIEBEL.

POWER S'HEARS FOR CUTTING KNIT 0R WOVEN FABRICS, &0.

No. 262,748. Patentea Aug.15, 1882.

FIG. 3.

m A H /n 0, K 1 v u a C l 2 G G H F INVENTOR ugraphor, wunm wn. n. a

WITNESSES:

UNITED STATES PATENT Fries.

\VILLIAM DIEBEL, OF PHILADELPHIA, ASSIGNOR OF ONE-HALF TO CON- YERS BUTTON, OF GEBMANTOWN, PENNSYLVANIA.

POWER-SHEARS FOR CUTTING KNIT OR WOVEN FABRICS, 84C.

SPECIFICATION forming part of Letters Patent N0. 262,748, dated August 15, 1882,

Application filed June 23, 1882. (No model.)

To all whom rt may concern Be it known that I, WILLIAM YDIEBEL, of 1 the city and county of Philadelphia, in' the State'of Pennsylvania, have invented certain new and useful Improvements in Power-Shears for Cutting Knit or Woven Fabrics, &c.

The following is a specification of my improvements, reference being had to the accompanyin g drawings, wherein- Figure 1 is a view in perspective, and Fig. 2 an end elevation, of my improved shear, Fig. 3 being an elevation of a portion thereof, seen from theopposite end to that indicated in Fig. 1. Fig. 4 is a view in perspective of the end por tion of the rock-shaft.

It being often desirable to trim the seams or edges of sewed fabrics, it is found convenient to have the trimming device in juxtaposition to the sewing-machine in order to avoid loss of time in handling the goods and to accomplish the trimming immediately after the sewing operation.

The object of my invention is to provide a means of adjusting the shears vertically and horizontally, so that they can be set in any desired position; also, to permit the adjustment of the blades relatively to one another, so as to compensate for the wearing away of their cutting-edges, and also to render the parts readily detachable, so that they can be replaced or renewed without trouble.

The tubular base-piece A may be mounted upon a table or other support convenient to a driving shaft, and receives the telescoping standard B, which, by means of the set-screw C, may be adjusted at the proper height and horizontal angle. A horizontal guide-piece, J,

mounted upon the telescoping'standard B, carries the slotted arm 0, whose downwardlydepending side flanges, a, conform to the sides of the piece J, and the sleeve E and socket L, at right angles thereto, and cast in one piece with the arm 0. Avertical screw-shank, K, projects upwardly from the guide -piece J through the slot H of the arm 0, and is provided with a nut, D, by means of which the arm 0, its sleeve E, and socket L may be set at any desired position horizontally. The sleeve E forms the bearings of the shaft F,

I which is provided with the eccentric N and the usual fast and loose pulleys, I M, respectively.

A cylindrical shank, O, fits snugly in the socket L, and is capable of adjustment by means of theset-screw P. The shank O ter- Inin ates in a down wardly-iuclinedplatform, Q, which supports the shearing mechanism. This latter consists of a stationary lower blade, 1%, formed of a steel plate, which is adjustable laterally by means of the clamping-screw r and an upper blade, S, which is oscillated by means of the rock-shaft T. To render the upper blade, S, adjustable in the direction of its length, 1 form a horizontal slot, t, and a vertical slot, 8, in the head of therock-shaft. The upper blade, S, consisting of a rigid flat bar of steel, fits snugly in the recess formed by the slot t, and is held in position by means of the clampingpiece 12, which is secured in the vertical slot 8 by means of a-screw, 2.

It will thus be seen that by slightly loosening the screw z the blade S is permitted to slide longitudinally in the recess t, so as to be adjustable at any point or removed for sharpening when necessary.

The rock-shaft T, supported in bearings V V, is actuated by means of the eccentric N and strap a, the latter being constructed so as to allow of considerable play to compensate for the differences of position of the shearing mechanism relatively to the shaft F, caused by varying adjustments of the shank O in the socket L.

The device whereby the eccentric-strap u is attached to the rock-shaft T forms another and, valuable feature of improvement. The projectin g end, 19, of the rock-shaft passes through a crank, 0, is secured to it by means of a setscrew, w, and is then received into a snuglyfitting eye in the end of the strap a.

A clamping-screw, cl, mounted upon the rear end of the crank 0, passes through a curved slot, m, formed in the strap a, as indicated by the dotted lines in Fig. 3, and is provided with a collar, 0, by means of which the strap can be securely clamped to the crank 0. Within the limits of the arc of this slot at the crank 0 and rock-shaft T, and consequently the blade S,

can be rotated and secured in any desired position relatively to the eccentric-strap u, the object of such adjustment being as follows:

It is desirable to have the cutting actionrock-shaft to the tip of the blade S is greater than the length of the crank 0 the are through which the end of the blade S may be adj usted is of greater extent than the whole depth of,

the blade. As the blade S becomes worn away vertically its edge may be adjusted downward, so as to out against the fixed blade It until too thin to sustain the strain of cutting, after which, by loosening the clamp u, the blade S maybe protruded forward, so as'to bring fresh portions into operation. The strip which forms the blade S can thus be used down to the n'tmost'possible limits of length andwidth, while any wearing away of its thickness can be compensated by the lateral adjustment of the lower blade, 1t.

Having thus described my invention,l claim and desire to secure by Letters Patent- 1. The combination, with the base-plate and the shears, of the telescoping standard 13, adjustable both vertically and axially, arm S, adjustable horizontally, and their respective clamping devices, substantially as set forth.

2. The combination, with the shears and the base-piece, .of the socket L and shank O and clamping device, substantially as set forth.

3. The combination, with the stationary blade, of an oscillating blade adjustable in the arc of its oscillation, substantially as set forth.

4. The combination of the blade S, the slot t in the head of the rock-shaft, and the clamping device u, substantially as set forth.

5. The combination of a laterally-adjustable fixed blade with an oscillating blade adjustable both longitudinally and in the arc of its oscillation, substantially as set forth.

6. The combination of the rock-shaft T and the crank 0, secured thereto, with the eccentric-strap to'and curved slot 19 and the clamping device, whereby-said crank and strap may be adjusted relatively to one another, substantially as and for the purposesset forth.

WILLIAM DIESEL.

Witnesses:

CHARLES F. ZIEGLER, J. WALTER DOUGLASS. 

